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Check vm.max_map_count in datanode preflight (#17436)

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* check vm.max_map_count in preflight

* CL

* fix command path for macOS

* Revert "fix command path for macOS"

This reverts commit caff2a512b.

* revert unneeded macOS check; rename
This commit is contained in:
Patrick Mann
2023-11-27 09:14:23 +01:00
committed by GitHub
parent e3d80a3710
commit a613989e71
3 changed files with 68 additions and 0 deletions
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2
data-node/src/main/java/org/graylog/datanode/bindings/PreflightChecksBindings.java
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@@ -19,6 +19,7 @@ package org.graylog.datanode.bindings;
import com.google.inject.AbstractModule;
import com.google.inject.multibindings.MapBinder;
import org.graylog.datanode.bootstrap.preflight.DatanodeDirectoriesLockfileCheck;
import org.graylog.datanode.bootstrap.preflight.OpenSearchPreconditionsCheck;
import org.graylog.datanode.bootstrap.preflight.OpensearchBinPreflightCheck;
import org.graylog.datanode.bootstrap.preflight.OpensearchConfigSync;
import org.graylog2.bootstrap.preflight.PreflightCheck;
@@ -31,6 +32,7 @@ public class PreflightChecksBindings extends AbstractModule {
addPreflightCheck(OpensearchConfigSync.class);
addPreflightCheck(OpensearchBinPreflightCheck.class);
addPreflightCheck(DatanodeDirectoriesLockfileCheck.class);
addPreflightCheck(OpenSearchPreconditionsCheck.class);
}

61
data-node/src/main/java/org/graylog/datanode/bootstrap/preflight/OpenSearchPreconditionsCheck.java Normal file
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@@ -0,0 +1,61 @@
/*
* Copyright (C) 2020 Graylog, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*/
package org.graylog.datanode.bootstrap.preflight;
import org.graylog2.bootstrap.preflight.PreflightCheck;
import org.graylog2.bootstrap.preflight.PreflightCheckException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
/**
* Check required system parameters
*/
public class OpenSearchPreconditionsCheck implements PreflightCheck {
private static final Logger LOG = LoggerFactory.getLogger(OpenSearchPreconditionsCheck.class);
private static final long MAX_MAP_COUNT_MIN = 262144L;
@Override
public void runCheck() throws PreflightCheckException {
ProcessBuilder builder = new ProcessBuilder().redirectErrorStream(true);
builder.command("/sbin/sysctl", "-n", "vm.max_map_count");
try {
final Process process = builder.start();
final BufferedReader reader = new BufferedReader(
new InputStreamReader(process.getInputStream(), Charset.defaultCharset()));
String line = reader.readLine();
reader.close();
int exitVal = process.waitFor();
if (exitVal != 0) {
System.out.println("Sysctl failed with error return " + exitVal);
return;
}
if (line != null) {
long count = Long.valueOf(line);
if (count < MAX_MAP_COUNT_MIN) {
throw new RuntimeException("vm.max_map_count = " + count + " but should be at least " + MAX_MAP_COUNT_MIN);
}
}
} catch (IOException | InterruptedException e) {
LOG.warn("Failed to run sysctl check: {}", e.getMessage(), e);
}
}
}